20843396 has 12 divisors (see below), whose sum is σ = 41686848. Its totient is φ = 8932872.

The previous prime is 20843393. The next prime is 20843413. The reversal of 20843396 is 69334802.

It is a happy number.

20843396 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20843393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372176 + ... + 372231.

It is an arithmetic number, because the mean of its divisors is an integer number (3473904).

Almost surely, 2^20843396 is an apocalyptic number.

It is an amenable number.

20843396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20843396 is a wasteful number, since it uses less digits than its factorization.

20843396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744418 (or 744416 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20843396 is about 4565.4568227068. The cubic root of 20843396 is about 275.2048985348.

The spelling of 20843396 in words is "twenty million, eight hundred forty-three thousand, three hundred ninety-six".